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- Product Title: Power Control Module & Battery backed Real Time Clock (RTC) for PandaBoard
- Manufacturer/Publisher: 4D
- Stock Code: 4D-PANDA-PCMRTC
- QuickCode: 17781
- Format: Hardware
- Product Group: Pandaboard, Titanium & IGEPv5 systems & Accessories
- Condition: New
- Availability: Usually available from stock
- Description:
A plug-in battery backed-up Real Time Clock module with temperature sensor for the PandaBoard & Pandaboard ES, with ATX PSU control functionality.
Two on/off inputs
Three on/off outputs
On board PIC controlled via I2C (specification here.)
Connect the on board PICs power input to an always on power e.g. an Pico, MiniITX or ATX's 'standby power' and then connect a momentary or latching On/Off switch to the board for power control like on a standard PC.
Support for 'Soft Off'[1]
Reset function
Force off option.
Front miniITX/ATX case Power-On LED support
Front miniITX/ATX case Filing system access (eg. HDD) One/Three colour LED support[2]
[1] Soft Off supported in RISC OS. We are looking for a Linux programmer to help implement Linux support. If interested please email chris@cjemicros.co.uk
[2] Filing system access LED supported in RISC OS.
Including option for red LED for Write and green LED flashes for Read if a two colour LED is connected. We are looking for a Linux programmer to help implement Linux support. If interested please email chris@cjemicros.co.uk
Specifications:
PIC
Real Time Clock chip: Maxim DS1338
Temperature Sensor: MCP9801 (LM75 compatible)
Cell (Battery): CR1220
Crystal Accuracy: 20ppm (better than 1 minute a month)
Battery Capacity: Approximately five years.
Suitable for original PandaBoard & PandaBoard ES.
Plugs into 'Expansion connector A'
Optional 32kbit EEPROM available to order.
Includes:
Real Time Clock Module with Temperature Sensor
CR1220 Battery (unfitted)
Fitting Instructions
Linux Software:
The standard DS1307 RTC driver will work with the module
RISC OS support:
RISC OS support for the RTC is built in.
Software to read from the temperature sensor is available from our website here
NB. This plugs onto "Expansion Connector A", which will need to be fitted to your PandaBoard. If you don't have this fitted, you can purchase a set of pins to solder in here.
Trade and volume enquiries welcome.
More information:
The RTC board has been designed so that as much of the expansion header is available as possible with a mixture of direct accessibility and pass through.
The board plugs into pins 1-6 and 23-28
Pins 7-22 can be accessed by plugging in connectors of the type reset switches normally use.
The pass through/ancillary connector (J3) on our board has:
1 GND
2 SDA (level shifted to 5V)
3 SCL (level shifted to 5V)
4 5V
5 SQW/OUT from clock (DS1338) at 5V level
6 ALERT from temperature sensor (MCP9801) at 5v level
7 Pin 3 (GPMC_AD7/SDMMC2_DAT7) via a 150R/Q1 for possible filing system activity LED (active low)
8 5V for GPIO LED if in use
We have fitted the board inside a Tigal case and being 1.1" high it is no higher than the USB/Network socket so should also fit other cases including Special Computing's acrylic case.
- Price: £55.00 no UK VAT to pay!
- Free UK delivery on orders of £40 or more! (exceptions apply)
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